EP4060426A1 - Verfahren zur herstellung eines verkleidungsteils einer uhr oder eines schmuckstücks auf keramikbasis und mit einem strukturierten dekor - Google Patents

Verfahren zur herstellung eines verkleidungsteils einer uhr oder eines schmuckstücks auf keramikbasis und mit einem strukturierten dekor Download PDF

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Publication number
EP4060426A1
EP4060426A1 EP21163722.8A EP21163722A EP4060426A1 EP 4060426 A1 EP4060426 A1 EP 4060426A1 EP 21163722 A EP21163722 A EP 21163722A EP 4060426 A1 EP4060426 A1 EP 4060426A1
Authority
EP
European Patent Office
Prior art keywords
base
manufacturing process
process according
pixels
patterns
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP21163722.8A
Other languages
English (en)
French (fr)
Other versions
EP4060426B1 (de
Inventor
Frédéric Jeanrenaud
Gregory Kissling
Pierre SAURET
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Omega SA
Original Assignee
Omega SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Omega SA filed Critical Omega SA
Priority to EP21163722.8A priority Critical patent/EP4060426B1/de
Priority to US17/647,200 priority patent/US12697685B2/en
Priority to JP2022003533A priority patent/JP7329631B2/ja
Priority to KR1020220018382A priority patent/KR102742374B1/ko
Priority to CN202210269367.8A priority patent/CN115107404A/zh
Publication of EP4060426A1 publication Critical patent/EP4060426A1/de
Application granted granted Critical
Publication of EP4060426B1 publication Critical patent/EP4060426B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
    • B23K26/355—Texturing
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B37/00—Cases
    • G04B37/22—Materials or processes of manufacturing pocket watch or wrist watch cases
    • G04B37/225—Non-metallic cases
    • G04B37/226—Non-metallic cases coated with a metallic layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C5/00—Processes for producing special ornamental bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/0006—Working by laser beam, e.g. welding, cutting or boring taking account of the properties of the material involved
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/60—Preliminary treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/24—Ablative recording, e.g. by burning marks; Spark recording
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/06—Dials
    • G04B19/12—Selection of materials for dials or graduations markings
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B45/00—Time pieces of which the indicating means or cases provoke special effects, e.g. aesthetic effects
    • G04B45/0015—Light-, colour-, line- or spot-effects caused by or on stationary parts
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B45/00—Time pieces of which the indicating means or cases provoke special effects, e.g. aesthetic effects
    • G04B45/0076—Decoration of the case and of parts thereof, e.g. as a method of manufacture thereof
    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D3/00—Watchmakers' or watch-repairers' machines or tools for working materials
    • G04D3/0069—Watchmakers' or watch-repairers' machines or tools for working materials for working with non-mechanical means, e.g. chemical, electrochemical, metallising, vapourising; with electron beams, laser beams
    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D3/00—Watchmakers' or watch-repairers' machines or tools for working materials
    • G04D3/0074—Watchmakers' or watch-repairers' machines or tools for working materials for treatment of the material, e.g. surface treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/50—Inorganic materials other than metals or composite materials

Definitions

  • the invention relates to the field of watchmaking or jewelry, and relates more particularly to a process for manufacturing a piece of watchmaking or jewelry casing with a ceramic base and structured decoration.
  • the invention also relates to a timepiece dial manufactured by implementing said method.
  • a method comprising a first step in which the surface of a trim part is structured, by stamping or by laser, with patterns or a structure of the grained type.
  • the covering part is made of a metal, for example aluminum or a copper alloy.
  • the surface is polished, then covered with a layer of a white-colored material, for example silver, by galvanic means or by vacuum thin film deposition method, for example of the physical phase deposition type.
  • vapor known by the acronym in English “PVD” for “Physical Vapor Deposition”
  • ALD Atomic Layer Deposition
  • the invention solves the aforementioned drawbacks by proposing a solution making it possible to produce a trim part whose visual appearance has a high shine and luster, and in particular an aesthetic appearance of particularly intense and pronounced frost.
  • the patterns appear visually, on the one hand, thanks to the mechanical surface structuring carried out during the laser machining step, and on the other hand, thanks to the difference in surface state between said patterns, matte appearance, and the rest of the display surface, shiny appearance.
  • the mechanical structuring of the display surface thus makes it possible, by modifying the diffraction of light, to generate optical effects reinforcing the appearance of frost on said surface.
  • the invention may also comprise one or more of the following characteristics, taken in isolation or in any technically possible combination.
  • the base is made of a zirconium oxide substrate.
  • the base is made of glass, stone, alumina or sapphire.
  • the base is made so as to have a thickness of between 0.1 mm and 1.2 mm, preferably 0.4 mm.
  • the predefined patterns are obtained by processing a digital image, so as to obtain an image formed of black pixels and white pixels, said black pixels or white pixels representing the patterns to be machined.
  • the image obtained is formed of black pixels, of white pixels, and of pixels in shades of gray, said pixels black, white or in shades of gray representing the patterns to be machined.
  • the shade of gray of the pixels is representative of the machining depth.
  • the shade of gray of each pixel in shade of gray is representative of the machining depth of the area of the pattern corresponding to each of said pixels.
  • the graphic content of the digital image comprises a dendritic form, such that the patterns machined on the base give a dendritic appearance to the base.
  • the area of the patterns represents between 25% and 75% of the display area.
  • the patterns have a depth comprised between 200 nm and 50 ⁇ m, preferentially between 5 ⁇ m and 10 ⁇ m.
  • the heat treatment is carried out at a temperature between 500 and 1000 degrees Celsius.
  • a step of depositing a thin layer on a face of the base opposite the display face, called the “lower face”, is carried out after the oxidation step.
  • the step of depositing a thin layer on the underside consists of applying a varnish.
  • a step of depositing a thin transparent or semi-transparent layer on the display face is carried out after the oxidation step.
  • the present invention also relates to a timepiece dial, such as a watch, obtained by implementing a manufacturing method as described above.
  • the present invention relates to a process for manufacturing a watch or jewelery casing part, the steps of which are represented schematically by the flowchart of the figure 1 .
  • the base is preferably made from a zirconium oxide substrate. This material advantageously has the appropriate optical and mechanical characteristics to form the base, in addition to being relatively easy to work with.
  • the substrate can be any ceramic material, such as glass, stone, alumina, sapphire, etc.
  • the substrate has a single color, for example a white color.
  • the base is made so as to have a thickness of between 0.1 mm and 1.2 mm, preferably 0.4 mm.
  • the mirror polishing step 102 of the display face of the base allows said display face to obtain a shiny appearance, having a high reflective power.
  • the machining step 103 is preferably carried out by nanosecond, picosecond or femtosecond laser engraving.
  • the machining step generally designates any material removal operation, such as engraving or marking.
  • the laser engraving is performed by a laser machining machine controlled so as to machine patterns on the surface of the display face.
  • the processing of the predetermined digital image consists in obtaining, thanks to an image processing algorithm, a digital image transformed comprising a set of black pixels and white pixels representative in particular of the luminosity and of the contrast of the predetermined digital image.
  • the black pixels correspond to the darkest pixels of the predetermined digital image, i.e. those whose brightness is below a predefined threshold
  • the white pixels correspond to the lightest pixels of the predetermined digital image, that is to say those whose brightness is greater than the predefined threshold.
  • the black pixels or the white pixels represent the patterns to be machined.
  • the image obtained is formed, in addition to black pixels and white pixels, of pixels in shades of gray.
  • the shade of gray of each grayscale pixel corresponds to the brightness of the corresponding pixel.
  • the shade of gray of each pixel in shade of gray is representative of the machining depth of the area of the pattern corresponding to each of said pixels.
  • the graphic content of the digital image has a dendritic shape, so that the patterns machined on the base give a dendritic appearance to the display face.
  • the patterns can be arranged randomly on the surface of the display face or in predefined areas.
  • the area of the patterns represents between 25% and 75% of the display area, preferably between 40% and 60%. In this way, the dendritic appearance of the display face is reinforced.
  • the patterns are machined so as to have a depth comprised between 200 nm and 50 ⁇ m, a presence between 5 ⁇ m and 10 ⁇ m.
  • the laser machining produces a local sublimation of the material of the substrate, at the level of the machined pattern, and consequently a heating producing a change in hue.
  • the step 104 of oxidation of the base by heat treatment advantageously allows the base to regain its initial color.
  • the heat treatment is carried out at a temperature between 500 and 1000 degrees Celsius.
  • the trim part obtained advantageously has a high shine and luster.
  • the machined patterns have a matte appearance and the rest of the display surface has a shiny appearance
  • the display face generates an optical effect which, in combination with the dendritic appearance of the patterns, contributes to reinforce the appearance of frost.
  • a step 106 of depositing a thin layer on a face of the base opposite the display face, called the "lower face”, can be carried out after the oxidation step 104.
  • This step has the effect of opacifying the substrate and possibly increasing the mechanical characteristics of the covering part, for example in the case where the thickness of the base is particularly low.
  • the step 106 of depositing a thin layer on the underside consists of applying a varnish.
  • a step 107 of depositing a thin layer on the display face can be performed after the oxidation step 104, said thin layer being transparent or semi-transparent.
  • This thin layer then has the effect of protecting the base from any chemical or mechanical attack and possibly of modifying its tint.
  • This deposition step 107 may consist of the application of a thin layer by physical vapor deposition (known by the acronym in English “PVD” for “physical vapor deposition”).
  • this deposition step 107 may consist of the application of a varnish or a lacquer, for example structured.
  • deposition steps 106 and 107 are independent of each other in the sense that one can be carried out without that the other is, and where the order of carrying out these stages is indifferent, although the flowchart of the figure 1 illustrates the performance of the deposition step 106 before the performance of the deposition step 107.
  • the timepiece or jewelry casing part manufactured by implementing the method according to the invention is a timepiece dial, such as a watch.
  • the trim part manufactured by the method according to the invention can be constituted by any decorative article in the fields of watchmaking or jewelery intended to be visible to a user.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Adornments (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
EP21163722.8A 2021-03-19 2021-03-19 Verfahren zur herstellung eines verkleidungsteils einer uhr oder eines schmuckstücks auf keramikbasis und mit einem strukturierten dekor Active EP4060426B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP21163722.8A EP4060426B1 (de) 2021-03-19 2021-03-19 Verfahren zur herstellung eines verkleidungsteils einer uhr oder eines schmuckstücks auf keramikbasis und mit einem strukturierten dekor
US17/647,200 US12697685B2 (en) 2021-03-19 2022-01-06 Method for manufacturing a ceramic-based external horological or jewellery part with patterned decoration
JP2022003533A JP7329631B2 (ja) 2021-03-19 2022-01-13 パターン化された装飾があるセラミックスベースの計時器又は宝飾品用の外側部品を製造する方法
KR1020220018382A KR102742374B1 (ko) 2021-03-19 2022-02-11 패터닝된 장식을 갖는 세라믹-기반 외부 시계 또는 쥬얼리 부품을 제조하기 위한 방법
CN202210269367.8A CN115107404A (zh) 2021-03-19 2022-03-18 用于制造具有图案化装饰的基于陶瓷的钟表或珠宝的外部零件的方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21163722.8A EP4060426B1 (de) 2021-03-19 2021-03-19 Verfahren zur herstellung eines verkleidungsteils einer uhr oder eines schmuckstücks auf keramikbasis und mit einem strukturierten dekor

Publications (2)

Publication Number Publication Date
EP4060426A1 true EP4060426A1 (de) 2022-09-21
EP4060426B1 EP4060426B1 (de) 2025-02-19

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Family Applications (1)

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EP21163722.8A Active EP4060426B1 (de) 2021-03-19 2021-03-19 Verfahren zur herstellung eines verkleidungsteils einer uhr oder eines schmuckstücks auf keramikbasis und mit einem strukturierten dekor

Country Status (5)

Country Link
US (1) US12697685B2 (de)
EP (1) EP4060426B1 (de)
JP (1) JP7329631B2 (de)
KR (1) KR102742374B1 (de)
CN (1) CN115107404A (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8685185B2 (en) * 2006-09-29 2014-04-01 University Of Rochester Femtosecond laser pulse surface structuring methods and materials resulting therefrom
EP3591099A1 (de) * 2018-07-05 2020-01-08 Comadur S.A. Herstellungsverfahren eines keramikteils, das zumindest teilweise mit einer elektrisch leitenden schicht beschichtet ist
EP3699695A1 (de) * 2019-02-25 2020-08-26 Comadur S.A. Komponente mit mehreren verzierungen und/oder mehreren farben eines uhrwerks mit keramikstruktur

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JP4157851B2 (ja) 2004-03-18 2008-10-01 有限会社マキハラ 指輪の内面への写真画像形成方法
JP4832800B2 (ja) 2005-05-27 2011-12-07 京セラ株式会社 セラミック製装飾部材およびその製造方法
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EP3709102B1 (de) 2019-03-14 2024-07-10 Omega SA Komponente eines uhrwerks oder schmuckstücks auf keramikbasis und mit einer dekorstruktur
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Publication number Priority date Publication date Assignee Title
US8685185B2 (en) * 2006-09-29 2014-04-01 University Of Rochester Femtosecond laser pulse surface structuring methods and materials resulting therefrom
EP3591099A1 (de) * 2018-07-05 2020-01-08 Comadur S.A. Herstellungsverfahren eines keramikteils, das zumindest teilweise mit einer elektrisch leitenden schicht beschichtet ist
EP3699695A1 (de) * 2019-02-25 2020-08-26 Comadur S.A. Komponente mit mehreren verzierungen und/oder mehreren farben eines uhrwerks mit keramikstruktur

Also Published As

Publication number Publication date
CN115107404A (zh) 2022-09-27
US12697685B2 (en) 2026-08-04
EP4060426B1 (de) 2025-02-19
US20220297235A1 (en) 2022-09-22
JP2022145500A (ja) 2022-10-04
JP7329631B2 (ja) 2023-08-18
KR20220131153A (ko) 2022-09-27
KR102742374B1 (ko) 2024-12-12

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